New Flat Iron Mini 2 IN 1 Wireless Hair Straightener with USB Charging Roller 4800mah Portable Cordless Curler Dry and Wet UsesFeatureStep A: Open the sleeve;Step 2 B: Turn on the safety switch;The 0 step C: lengthy press the swap key for three seconds;Step 4 E: Click on/off to switch the temperature gear;Step 5F: Insufficient power, use USB to charge (5V/2A);Reminder: When combing hair, it is suggested to take a small number of hair every time (about 2 small hands width hair) for operation, the impact is better.